201161420417 has 2 divisors, whose sum is σ = 201161420418. Its totient is φ = 201161420416.

The previous prime is 201161420407. The next prime is 201161420429. The reversal of 201161420417 is 714024161102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191777429776 + 9383990641 = 437924^2 + 96871^2 .

It is a cyclic number.

It is not a de Polignac number, because 201161420417 - 2¹² = 201161416321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201161420417.

It is not a weakly prime, because it can be changed into another prime (201161420407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100580710208 + 100580710209.

It is an arithmetic number, because the mean of its divisors is an integer number (100580710209).

Almost surely, 2^201161420417 is an apocalyptic number.

It is an amenable number.

201161420417 is a deficient number, since it is larger than the sum of its proper divisors (1).

201161420417 is an equidigital number, since it uses as much as digits as its factorization.

201161420417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

Adding to 201161420417 its reverse (714024161102), we get a palindrome (915185581519).

The spelling of 201161420417 in words is "two hundred one billion, one hundred sixty-one million, four hundred twenty thousand, four hundred seventeen".